itch.io

Using only symbols available in the "ascii" set of characters

Near infinitely replayable games that usually feature, random generation, perma-death, and brutal difficulty. 

Focused on using its text, moreso than its visuals or audio, to tell the bulk of its story/plot. (Still can have great audio and visuals, though!)

Resources for building and relating to User Interfaces, how the user interacts with your program